Scanning apparatus having a cascade scanning optical system

Details Scanning apparatus having a cascade scanning optical system Scanning apparatus having a cascade scanning optical system

1997-12-31

1999-05-11

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359204, 359212, 359216, 347243, G02B26/08

Patent

active

059033789

ABSTRACT:
Disclosed is a scanning apparatus having a cascade scanning optical system. The scanning apparatus includes: a first laser scanning optical system for deflecting a first scanning laser beam to scan a scanning surface to generate a first scanning line during modulation of the first scanning laser beam in accordance with first given image data; a second laser scanning optical system for deflecting a second scanning laser beam to scan the scanning surface to generate a second scanning line during modulation of the second scanning laser beam in accordance with second given image data, wherein the first and second laser scanning optical systems are arranged so as to align the first scanning line with the second scanning line at a point of contact therebetween in a main scanning direction to form a single scanning line; a first laser beam detector fixed at a position to detect the first scanning laser beam before the first scanning laser beam starts generating the first scanning line; a second laser beam detector fixed at a position to detect the first scanning laser beam after the first scanning laser beam has completed generating the first scanning line; a measuring device for measuring a time interval; a determining device for determining a time-delay interval; and an adjusting device for adjusting the time at which the first scanning line starts to be generated, in accordance with the time-delay interval.

REFERENCES:
Konica Technical Report vol. 9 (1996), along with an English language translation. (No Month).

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